ERA Piping Systems, PP Thread Fitting ,Female Thread Tee , PEX007 , (ENISO1587AS/NZS4129) , Watermark & WRAS More related products of PP THREAD FITTINGS REDUCER ELBOW Production Process of PP THREAD FITTINGS REDUCER ELBOW Company Introduction of PP THREAD FITTINGS REDUCER ELBOW International...nPP pipe is a semi-crystalline material. It is stronger than PE and has a higher melting point. Because homopolymer PP pipes are very brittle when the temperature is above 0°C, many commercial PP materials are random copolymers with 1 to 4% ethylene added or clamp copolymers with higher ethylene content. Copolymer PP materials have lower heat distortion temperature (100°C), low transparency, low gloss, and low rigidity, but have stronger impact strength. The activity rate MFR of PP is limited to 1~40. Moreover, the uniformity of the shrinkage rate is much better than that of PE-HD and other materials. Adding 30% glass additive can reduce the shrinkage rate to 0.7%. Both homopolymer and copolymer PP materials have excellent moisture absorption resistance, acid and alkali corrosion resistance, and melting resistance. However, it has no resistance to aromatic hydrocarbon (such as benzene) solvents, chlorinated hydrocarbon (carbon tetrachloride) solvents, etc. PP pipes also do not have oxidation resistance at high temperatures like PE.